Update git submodules

Update git submodules

* Update docs/submodules/so.git from branch 'master'
  to a76c0e09e17423d282ecaa976e52f60f098498ff
  - Merge "Fix GR_API Homing"
  - Fix GR_API Homing

    This change uses the correct
    variable name to enable homing
    in AssignVnfBB.
    The correct variable to use is
    not 'callHoming' but 'homing'. Also
    updated sunnyDayAssignVnfBBTest to
    use the correct variable and BaseBPMNTest.

    This change also corrects HomingBB
    and calls HomingV2 rather than SniroV2
    or OofV2. HomingV2 already passes calls
    to the correct implimentation, no need
    do this in the BPMN.

    Issue-ID: SO-1470
    Change-Id: I14a77ef75b8b86feed7af3aab4d52c0df5f12886
    Signed-off-by: Marcus G K Williams <marcus.williams@intel.com>